ERROR

Error: /Stage[main]/Kvmhost::Config::Cobbler/Cobblersystem[hosting02.esotericsystems.at]: Could not evaluate: no implicit conversion from nil to integer
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:65:in `[]'
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:65:in `block (2 levels) in insync?'
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:64:in `uniq'
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:64:in `block in insync?'
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:59:in `each'
/var/lib/puppet/lib/puppet/type/cobblersystem.rb:59:in `insync?'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/property.rb:314:in `safe_insync?'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction/resource_harness.rb:60:in `block in perform_changes'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction/resource_harness.rb:59:in `each'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction/resource_harness.rb:59:in `perform_changes'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction/resource_harness.rb:138:in `evaluate'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction.rb:161:in `apply'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction.rb:174:in `eval_resource'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction.rb:104:in `call'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/transaction.rb:104:in `block (2 levels) in evaluate'
/opt/bw/lib/ruby/gems/1.9.1/gems/puppet-3.3.0/lib/puppet/util.rb:354:in `block in thinmark'
/opt/bw/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'

lib_puppet_type_cobblersystem.rb

  newproperty(:interfaces) do
    desc 'The list of interfaces in system.'

    def insync?(is)
      # @should is an Array. see lib/puppet/type.rb insync?
      should = @should.first

      # if members of hashes are not the same, something
      # was added or removed from manifest, so return false
      return false unless is.class == Hash and should.class == Hash and is.keys.sort == should.keys.sort
      # check if something was added or removed on second level
      is.each do |l,w|
        if w.is_a?(Hash)
          # hack for 'management' setting (which is being read all the time)
          should[l]['management'] = false unless should[l].has_key?('management')
          # check every key in puppet manifest, leave the rest
          should[l].keys.uniq do |to, key|  # XXX this is line 65
            return false unless to[key] != w[key]
          end
        end
      end
      # if some setting changed in manifest, return false
      should.each do |k, v|
        if v.is_a?(Hash)
          v.each do |l, w|
            unless is[k][l].nil? 
               return false unless is[k][l].to_s == w.to_s
            end
          end 
        end 
      end 
      true
    end 

    def should_to_s(newvalue)
      newvalue.inspect
    end 

    def is_to_s(currentvalue)
      currentvalue.inspect
    end 
  end